Jassat, W, C Mudara, C Vika, M Dryden, M Masha, T Arendse, MJ Groome, et al. 2022. “Undiagnosed Comorbidities Among Individuals Hospitalised With COVID-19 in South African Public Hospitals”. South African Medical Journal 112 (9): 747-52. https://doi.org/10.7196/SAMJ.2022.v112i9.16417.